In 15 key states, the Democratic presidential nominee has 291 field offices compared to Trump’s 88, a number that includes offices shared by the campaigns and their party office.

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Wisconsin is the state with the most Trump field offices, followed by Virginia and Ohio. But not only does Clinton have more offices than the Republican nominee in all three states, but she is also ahead by a double-digit margin in polling of the first two, according to RealClearPolitics’s averages.

The polls are much closer in Ohio, where Clinton has 36 offices and Trump has 16.

The Trump campaign told PBS that it plans to open up 25 campaign-specific offices in Virginia; the Republican Party currently runs all 18 of the offices in the state.

The campaign also said it will open 57 offices across North Carolina, Florida and Pennsylvania, all states considered must-wins for Trump.

Republican officials have stressed that Trump’s lack of ground game has been bolstered by an increased party investment; the Republican National Committee touts 500 paid staffers and more than 4,000 volunteers for its ground effort, and Trump is the party’s top priority.

But Clinton’s ground game is directed mostly by the campaign itself instead of the party, which allows the candidate and her campaign more control over what happens in these swing states.

So while the RNC will augment Trump’s footprint, the lack of centralized control by the Trump campaign could make it harder if the party shifts resources around depending on polling trends up and down the ticket.